Means for heating fluids.



Y c. E. MOLHSWORTH MEANS FOR HEATING FLUIDS. APPLICATION PI'LED NOV. 22, 1911.

1 35,992. Patented Aug. 20, 1912.

v 2 SHEETS-$33M l. E z E :L.

I 171// 1 1 r1111 Ill G. E. MOLESWORTH. MEANS FOR HEATING FLUIDS.

APPLICATION FILED NOV. 22, 1911.

Patented Au 20, 1912'.

V 2 SHEETS-SHEET 2.

cnyn n n. MOLESWORTH, or PORTL ND, OREGON.

means roe HEATING moms.

Specification of Letters I'atenc.

LtBEEfdiJZ.

Application filed November 22, 19 11. Serial No, ($1,696;

Toai'l whom it may comer-n Be it known that I, CLYDE E. MoLns- WORTH, a citizen of the United States, re-

siding at Portland, in the county of Multnomah and State of Dregon, have. invented certain new and useful Improvements in Means for Heating Fluids, of which the following isv a specification.

My invention relates to improvements in means for heating fluids.

The object of my invention is to provide an apparatus which while offering a large heating surface, yet at the same time will maintain a quick circulation and be free from the dangers due to priming and foaming of the liquid being heated.

/Vith this general object inview, my invention consists in the features, details of construction and combination of parts which will first be described in connection with the accompanying drawings and then particularly pointed out in the claims.

ln the drawings,Figure l is a vertical sectional view through the center of an apparatus embodying my invention; Fig. 2, a sectionon the line f2-2, Fig. l, and Fig. 3,

section on line Fig. 1.

Referring to the drawings, A is a tank arranged to a liquid to be heated, the said tank having a bottom, ri,'arranged to be higher the center than at its periphery. in the present example the tank A is cylindrical and the bottom A is dished upward as sho wn in Fig. 1. The wall of the tank A is advantageously extended below the bottom A to form a flange or skirt A which. serves as a side casing to inclose the heating device, hereinafter Through the center of the bottom A extends a main discharge or return pipe B whose lower end is closed as indicated at I) while its .upper end extends some distance above the; bottom of the tank A and above the liquid levelin said tank, said upper end being open to the interior of the. tank A.

The portion of the pipe B above thebottom A is provided with,..a plurality of jet openings inclined outward and downward, for a purpose hereinafter explained.

indicated at C, C C and C described.

To the lower end ofth'e pipe B are con-1 nested the inner ends of a plurality of separ -cal circulating coils, which conicalternate with the convolutions four of such circulating coils are shown as Each coil Patented. Aug. 20, 1912.

has a feed inlet which communicates with i the tank at the lowest part of the bottom of said tank. These feed inlets indicated at 0', c c and 0 are distributed in such a way as to open into the tank at diilerentpoints of the tank bottom. In the presentexample these feed inlets extend through the bottom of the tank at points substantially 90 apart example, the inner end 0 of the lowest coil C is nearestthe bottom of the pipe B and enters from the left, Fig. 1; the inner end 0 of the next higher coil C has its center in a horizontal plane above that which passes through the-center of the inner end of the coil C and enters the pipe B from the right,

Fig. 1. The inner end 0 of the hi hest coil (1* has its center in a-horizontal plane above that through the center of the inner end 0 of the coil C The inner end of the coil 0 is opposite the observer in Fig. 1 while the inner end'c of the coil C is shown dotted in Fig. 1 because it enters the pipe B from.

the side nearest the observer.

Inside each circulating coil, C" to C, is located a heating coil, the respective heating coils being indicated at D, D D and D*, the'pipe from which each heating coil is made being sufiiciently smaller than the pipe from which the circulating coils aremade to leave a free space within each circulating coil for the passage of the liquidto be heated. The heating coils, D to D, are intended to' carry a heating fluid such as steam, or hot liquid, and the inlet and outletconnections of the respective heating coils are such that the flow of theheating fluid through the respective coils will be in a direction counter to the flow in the circulating coils ofthe li u'id to be heated. For this purpose the irilet ends, cl tori, of the respective heatin coils. are at the highest points of; the respective coils, while the outlets, (Z to d of the said heating coils are at their lowest points. The said inlet ends, at" to (Z are in communication with a common feed pipe, E, which passes through the bottom 6 of the main discharge pipe B and serves to conduct the heating fluid from any suitable source, not shown. At the point where the individual outlet pipes, 03 to d leave the circulating coils, C to C, the end "of the respective circulating coil is closed around such outlet pipe in order to prevent leaks. I have found that the various connections can best be made by suitable welding processes and particularly by the oxyacetylene process of -welding. Below the I coils I have illustrated a gas burner F, which may be used in case of emergency or as a source of additional heat.

The operation of my device is as follows: The tank A is filled .with liquid to a level below the end of the main discharge pipe B, as indicated by the line G in Fig. 1. This insures a supply of liquid to the circulating coils, C to G", through the inlet pipes, cto c and also through the main discharge pipe. A suitable heating fluidbeing supincoming heatin plied to the heating coils, the same flows up through the lower end of the main discharge pipe B, thence downward throughtherespective heating .coils and out and away through the return pipe H.- The heat of the heating coils heats the liquid to be heated in the circulating coils, andas this liquid becomes hot it- 'flows upward in the respective circulating coils thus causing a circ lation therein from the tank to the coils and hence back to the tank. It will be noted that the it is hottest, that s at the bottom of the main discharge pipe B, meets the outgoing liquid from the circulating coils thus insuring that said liquid shall not have'any opportunity to cool oil in the bottom of said main discharge pipe B. As the heating fluid gives off itsheat, it naturally tends to flow downward through the conical coils and thus no especial energy is required to maintain the flow of heating fluid.- The tank liquid when heated in the circulating coils returns to the tank through the jet openings in the pipe B. Hence, in case of any priming oi teaming of said liquid'in thecirculating coils, the rush of the bubbles due to pruning and foaming will be upward in the coils-and in the main discharge pipe, thus quickly I freeing the circulating coils from the foam and allowing the tank liquidto flow into the coils from the tank, while the foam which rises in the pipe B is readily dischargedupward above the level of the liquid in the tank, while any liquid accompanying said foam may flow freely through the jet openings back into the tank. Thus, no amount of priming and foaming can interfere with fluid at the point whenthecirculation of the tank liquid, and fur-' priming and foaming are completely avoided. The conical (3011s and the nesting ofthem in the way shown and described also gives a'relatively large heating surface when heating with the gas burner, and the hot products of combustion from the burner are so distributed and subdivided on their way betweent-he coils that good efficiency can be obtained. The telescopic arrangement of the heating coils within the circulating coils serves to brin the tank fluid into a relative 7 ciently while at the same time the cross-sectional area of this annular layer issufficient for the circulating efi'ect necessary to heat the tank liquid rapidly.

Having thus fully described my invention, what I claim is:

1. In a liquid heater, the combination, with a. tank, of a plurality of nested conical circulating coils having separate inlets leading from their lowest convolutions to the bottom of the tank and open to the interior of said tank, said circulating coils having 'thin annular ayer so that it is heated eflioutlets communicating with a main discharge pipe communicating with the tank, a plurality of heating coils, each concentrically arranged within a corresponding circulating coil, and means for causing a flow of heating fluid through the heating coils in a direction counter to the flow of liquid in the circulating coils.

:2. In a liquid heater, the combination, with a tank having an upwardly dished bottom, of a plurality of nested conical circulating coils having separate inlets leading from the lowest convolutions of the respective coils to the interior of the tank near the margin of the bottom, said inlets being spaced apart where they enter said tank, said circulating coils also having outlets at their highest points, a main dischargepipe extending through the highest point of the tank bottom and to a. oint above the liquid level therein, said disc a-rge pipe communicating with all the outlets of the circulating coils and with the interior of thetank, and means for heating the circulating coils.

3. In a liquid heater, the combination, with a tank having an upwardly dished bottom, of a plurality of nested conical circulatingcoils having separate inlets leading from the lowest convolutions of the respective coils to the interior of the tank near the margin of the bottom, said inlets being I culating coils and With the a spaced apart Where they enter said tank, i tank, and means for heating th i;

said circulating coils also having outlets at coils. p their highest 'points, a main discharge pipe 4 In Witness whereof I have hereunto affixed 5 extending through the highest point of the i my hand this 21st day of September 1911. in

tank bottom and to a point/above the liquid 7 r P V v level therein, zind having a plurality of dis- CLX DL MOLESM ORTH' tribnted downward and outwardlyextend- WVitnesses: ing jet openings, said discharge pipe con1- CLARENCE R. FORTH, 10 munleat-ing with all the outlets of the oir- T. F. KEHOE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents,

Washington, D. G. 

